TY - RPRT TI - Menstrual cycle length during methadone maintenance. AU - John Schmittner AU - Jennifer R Schroeder AU - David H Epstein AU - Kenzie L Preston PY - 2005 DO - 10.1111/j.1360-0443.2005.01091.x UR - https://pubmed.ncbi.nlm.nih.gov/15918813/ ID - 15918813 ER -