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Is more research always needed? Estimating optimal sample sizes for trials of retention in care interventions for HIV-positive East Africans
Jennifer
Uyei
,
Lingfeng
Li
,
R Scott
Braithwaite
BMJ Global Health
Aug 2017,
2
(2)
e000195;
DOI:
10.1136/bmjgh-2016-000195
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