From: An adaptive design to screen, treat, and retain people with opioid use disorders who use methamphetamine in methadone clinics (STAR-OM): study protocol of a clinical trial
# eligible (ASSIST + UDS)
UDS (+)
ASSIST ≥ 4
Hanoi clinic (N = 350)
26
31
114
HCMC clinic (N = 385)
52
64
122