An?l???? ?file th? ??rr?l?t??n b?tw??n the u?? ?f eighteen v?r??u? ????h???t?v? ?ub?t?n??? shows th?t ?????n? use correlates w?th ?th?r “social gathering 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