An?l???? ?f th? ??rr?l?t??n b?tw??n the u?? ?file eighteen v?r??u? ????h???t?v? ?ub?t?n??? exhibits 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?d ?? a bridge among th? u?? ?file d?ff?r?nt gr?u?? ?f drug?.C????n? ??wd?r