Nazarin ƙungiyar gama gari, wanda kuma aka sani da nazarin ƙungiyar mahalli (wanda aka gayyata EWAS ), Kuma wani nau'in binciken cututtukan cututtuka ne mai kwatankwacin binciken ƙungiyar genome-fadi, ko GWAS. EWAS a tsari yana bincika alaƙa tsakanin cuta mai rikitarwa da abubuwan muhalli da yawa na mutum, sarrafawa don gwajin hasashe da yawa. Patel, Chirag J.; Bhattacharya, Jayanta; Butte, Atul J. (2010-05-20). Zhang, Baohong (ed.). "An Environment-Wide Association Study (EWAS) on Type 2 Diabetes Mellitus". PLOS ONE (in Turanci). 5 (5): e10746. Bibcode:2010PLoSO...510746P. doi:10.1371/journal.pone.0010746. ISSN 1932-6203. PMC 2873978. PMID 20505766. Zhuang, Xiaodong; Ni, Ao; Liao, Lizhen; Guo, Yue; Dai, Wei; Jiang, Yunxi; Zhou, Huimin; Hu, Xun; Du, Zhimin; Wang, Xueqin; Liao, Xinxue (February 2018). "Environment-wide association study to identify novel factors associated with peripheral arterial disease: Evidence from the National Health and Nutrition Examination Survey (1999–2004)". Atherosclerosis (in Turanci). 269: 172–177. doi:10.1016/j.atherosclerosis.2018.01.006. PMID 29366990.