Strategies to maximise study retention and limit attrition bias in a prospective cohort study of men reporting a history of injecting drug use released from prison: the prison and transition health study.
Stewart AC, Cossar R, Walker S, Wilkinson AL, Quinn B, Dietze P, Winter R, Kirwan A, Curtis M, Ogloff JRP, Kinner S, Aitken C, Butler T, Woods E, Stoové M