What incentives are effective rewards for 'hidden populations' interviewed as a part of research projects?
Cottler
L B
LB
Compton
W M
WM
Keating
S
S
D000163:Acquired Immunodeficiency Syndrome / Q000517:prevention & control; D006801:Humans; D007407:Interviews as Topic / Q000379:methods; D009042:Motivation; D018579:Patient Selection; D012201:Reward