Correction to: Cluster identification, selection, and description in Cluster randomized crossover trials: the PREP-IT trials
Authors: Sprague Sheila , Scott Taryn , Dodds Shannon , Pogorzelski David , McKay Paula , Harris Anthony D. , Wood Amber , Thabane Lehana , Bhandari Mohit , Mehta Samir , Gaski Greg , Boulton Christina , Marcano-Fernández Francesc , Guerra-Farfán Ernesto , Hebden Joan , O’Hara Lyndsay M. , Slobogean Gerard P. ,   on behalf of the PREP-IT Investigators, Slobogean Gerard P. , Sprague Sheila , Wells Jeffrey , Bhandari Mohit , D’Alleyrand Jean-Claude , Harris Anthony D. , Mullins Daniel C. , Thabane Lehana , Wood Amber , Della Rocca Gregory J. , Hebden Joan , Jeray Kyle J. , Marchand Lucas , O’Hara Lyndsay M. , Zura Robert , Gardner Michael J. , Blasman Jenna , Davies Jonah , Liang Stephen , Taljaard Monica , Devereaux P. J. , Guyatt Gordon H. , Heels-Ansdell Diane , Marvel Debra , Palmer Jana , Friedrich Jeff , O’Hara Nathan N. , Grissom Frances , Gitajn I. Leah , Morshed Saam , O’Toole Robert V. , Petrisor Bradley A. , Camara Megan , Mossuto Franca , Joshi Manjari G. , Fowler Justin , Rivera Jessica , Talbot Max , Dodds Shannon , Garibaldi Alisha , Li Silvia , Nguyen Uyen , Pogorzelski David , Rojas Alejandra , Scott Taryn , Del Fabbro Gina , Szasz Olivia Paige , McKay Paula , Howe Andrea , Rudnicki Joshua , Demyanovich Haley , Little Kelly , Mullins C. Daniel , Medeiros Michelle , Kettering Eric , Hale Diamond , Eglseder Andrew , Johnson Aaron , Langhammer Christopher , Lebrun Christopher , Manson Theodore , Nascone Jason , Paryavi Ebrahim , Pensy Raymond , Pollak Andrew , Sciadini Marcus , Degani Yasmin , Demyanovich Haley K. , Joseph Katherine , Petrisor Brad A. , Johal Herman , Ristevski Bill , Williams Dale , Denkers Matthew , Rajaratnam Krishan , Al-Asiri Jamal , Leonard Jordan , Marcano-Fernández Francesc A. , Gallant Jodi , Persico Federico , Gjorgjievski Marko , George Annie , Natoli Roman M. , Gaski Greg E. , McKinley Todd O. , Virkus Walter W. , Sorkin Anthony T. , Szatkowski Jan P. , Baele Joseph R. , Mullis Brian H. , Hill Lauren C. , Hudgins Andrea , Osborn Patrick , Pierrie Sarah , Martinez Eric , Kimmel Joseph , Adams John D. , Beckish Michael L. , Bray Christopher C. , Brown Timothy R. , Cross Andrew W. , Dew Timothy , Faucher Gregory K. , Gurich Richard W. , Lazarus David E. , Millon S. John , Palmer M. Jason , Porter Scott E. , Schaller Thomas M. , Sridhar Michael S. , Sanders John L. , Rudisill L. Edwin , Garitty Michael J. , Poole Andrew S. , Sims Michael L. , Walker Clark M. , Carlisle Robert M. , Hofer Erin Adams , Huggins Brandon S. , Hunter Michael D. , Marshall William A. , Ray Shea Bielby , Smith Cory D. , Altman Kyle M. , Bedard Julia C. , Loeffler Markus F. , Pichiotino Erin R. , Cole Austin A. , Maltz Ethan J. , Parker Wesley , Ramsey T. Bennett , Burnikel Alex , Colello Michael , Stewart Russell , Wise Jeremy , Moody M. Christian , Tanner Stephanie L. , Snider Rebecca G. , Townsend Christine E. , Pham Kayla H. , Martin Abigail , Robertson Emily , Miclau Theodore , Kandemir Utku , Marmor Meir , Matityahu Amir , McClellan R. Trigg , Meinberg Eric , Shearer David , Toogood Paul , Ding Anthony , Donohue Erin , Belaye Tigist , Berhaneselase Eleni , Paul Alexandra , Garg Kartik , Gary Joshua L. , Warner Stephen J. , Munz John W. , Choo Andrew M. , Achor Timothy S. , Routt Milton L. “ Chip” , Rao Mayank , Pechero Guillermo , Miller Adam , Hagen Jennifer E. , Patrick Matthew , Vlasak Richard , Krupko Thomas , Sadasivan Kalia , Koenig Chris , Bailey Daniel , Wentworth Daniel , Van Chi , Schwartz Justin , Dehghan Niloofar , Jones Clifford B. , Watson J. Tracy , McKee Michael , Karim Ammar , Talerico Michael , Sietsema Debra L. , Williams Alyse , Dykes Tayler , Obremskey William T. , Jahangir Amir Alex , Sethi Manish , Boyce Robert , Stinner Daniel J. , Mitchell Phillip , Trochez Karen , Rodriguez Andres , Gajari Vamshi , Rodriguez Elsa , Pritchett Charles , Boulton Christina , Lowe Jason , Wild Jason , Ruth John T. , Taylor Michel , Seach Andrea , Saeed Sabina , Culbert Hunter , Cruz Alejandro , Knapp Thomas , Hurkett Colin , Lowney Maya , Prayson Michael , Venkatarayappa Indresh , Horne Brandon , Jerele Jennifer , Clark Linda , Marcano-Fernández Francesc , Jornet-Gibert Montsant , Martínez-Carreres Laia , Martí-Garín David , Serrano-Sanz Jorge , Sánchez-Fernández Joel , Sanz-Molero Matsuyama , Carballo Alejandro , Pelfort Xavier , Acerboni-Flores Francesc , Alavedra-Massana Anna , Anglada-Torres Neus , Berenguer Alexandre , Cámara-Cabrera Jaume , Caparros-García Ariadna , Fillat-Gomà Ferran , Fuentes-López Ruben , Garcia-Rodriguez Ramona , Gimeno-Calavia Nuria , Graells-Alonso Guillem , Martínez-Álvarez Marta , Martínez-Grau Patricia , Pellejero-García Raúl , Ràfols-Perramon Ona , Peñalver Juan Manuel , Domènech Mònica Salomó , Soler-Cano Albert , Velasco-Barrera Aldo , Yela-Verdú Christian , Bueno-Ruiz Mercedes , Sánchez-Palomino Estrella , Guerra-Farfán Ernesto , García Yaiza , Romeo Nicholas M. , Vallier Heather A. , Breslin Mary A. , Fraifogl Joanne , Wilson Eleanor S. , Wadenpfuhl Leanne K. , Halliday Paul G. , Viskontas Darius G. , Apostle Kelly L. , Boyer Dory S. , Moola Farhad O. , Perey Bertrand H. , Stone Trevor B. , Lemke H. Michael , Zomar Mauri , Spicer Ella , Fan Chen “Brenda” , Payne Kyrsten , Phelps Kevin , Bosse Michael , Karunakar Madhav , Kempton Laurence , Sims Stephen , Hsu Joseph , Seymour Rachel , Churchill Christine , Bartel Claire , Mayberry Robert Miles , Brownrigg Maggie , Girardi Cara , Mayfield Ada , Hymes Robert A. , Schwartzbach Cary C. , Schulman Jeff E. , Malekzadeh A. Stephen , Holzman Michael A. , Ramsey Lolita , Ahn James S. , Panjshiri Farhanaz , Das Sharmistha , English Antoinisha D. , Haaser Sharon M. , Cuff Jaslynn A. N. , Pilson Holly , Carroll Eben A. , Halvorson Jason J. , Babcock Sharon , Goodman J. Brett , Holden Martha B. , Bullard Debra , Williams Wendy , Higgins Thomas F. , Haller Justin M. , Rothberg David L. , Neese Ashley , Russell Mark , Coe Marcus , Dwyer Kevin , Mullin Devin S. , Reilly Clifford A. , DePalo Peter , Hall Amy E. , Heng Marilyn , Harris Mitchel B. , Smith R. Malcolm , Lhowe David W. , Esposito John G. , Bansal Mira , Bergin Patrick F. , Russell George V. , Graves Matthew L. , Morellato John , Champion Heather K. , Johnson Leslie N. , McGee Sheketha L. , Bhanat Eldrin L. , Mehta Samir , Donegan Derek , Ahn Jaimo , Horan Annamarie , Dooley Mary , Kuczinski Ashley , Iwu Ashley , Potter David , VanDemark Robert , Pfaff Branden , Hollinsworth Troy , Weaver Michael J. , von Keudell Arvind G. , McTague Michael F. , Allen Elizabeth M. , Jaeblon Todd , Beer Robert , Gage Mark J. , Reilly Rachel M. , Sparrow Cindy 
Published: September 2020

An amendment to this paper has been published and can be accessed via the original article.