Opium, phencyclidine, and crack cocaine smoking associations with lung and upper aerodigestive tract cancers: exploratory findings from a case-control study in Los Angeles County. - Zhang, Mingyan; Hashibe, Mia; Rao, Jian-Yu; Jung, Su Yon; Tashkin, Donald P.; Morgenstern, Hal; Zhang, Zuo-Feng (American Journal of Drug & Alcohol Abuse, 2023)