Discussion: subject selection, recruitment, and retention in longitudinal studies involving perinatal substance abuse and human immunodeficiency virus infection.
Bandstra
E S
ES
Department of Pediatrics, University of Miami School of Medicine, FL 33202.
D005260:Female; D015658:HIV Infections / Q000150:complications*; D006801:Humans; D011247:Pregnancy; D011248:Pregnancy Complications / Q000139:chemically induced*; D012107:Research Design; D019966:Substance-Related Disorders / Q000150:complications*