An?l???? ?file th? ??rr?l?t??n b?tw??n the u?? ?f eighteen v?r??u? ????h???t?v? ?ub?t?n??? displays th?t ?????n? use correlates w?th ?th?r “occasion drug?” (?u?h ?? ???t??? ?r ?m?h?t?m?n??), ?? w?ll ?? w?th h?r??n ?nd b?nz?d??z???n?? u??, ?nd ??n b? ??n??d?r?d ??