Add spaces: Outcomesincludetheproportionofsubjectsexperiencingsignificantpainreliefat15minutes.

Answer: Outcomes include the proportion of subjects experiencing significant pain relief at 15 minutes.

Add spaces: Uponclicking"CompleteOrder,"yourfriendsatLightInTheBoxspringintoactionandimmediatelybeginprocessingyourorder.

Answer: Upon clicking "Complete Order," your friends at LightInTheBox spring into action and immediately begin processing your order.

Add spaces: ThepapercontainsthreeletterswrittenbyValleePoussintoLuzindated4February1933,8March1933and21March1933.ValleePoussincommentsintheselettersonthefact,whichisofgreatinteresttohim,thatLuzinusedslightlydifferentclassificationsofthesamesetsashehadstudied.

Answer:
The paper contains three letters written by Vallee Poussin to Luzin dated 4 February 1933, 8 March 1933 and 21 March 1933. Vallee Poussin comments in these letters on the fact, which is of great interest to him, that Luzin used slightly different classifications of the same sets as he had studied.