title: Sometimes Poppers Are Not Poppers: Huffing as an Emergent Health Concern among MSM Substance Users.
authors.affiliation: Dept of Family Medicine, UCLA, Los Angeles, USA.
authors.forename: Timothy M
authors.initials: TM
authors.lastname: Hall
authors.affiliation: Dept of Family Medicine, UCLA, Los Angeles, USA.
authors.forename: Steven
authors.initials: S
authors.lastname: Shoptaw
authors.affiliation: Friends Research Institute, Inc., Los Angeles, USA; David Geffen School of Medicine, Integrated Substance Abuse Programs, Semel Institute for Neuroscience and Human Behavior, University of California, Los Angeles, CA, USA.
authors.forename: Cathy J
authors.initials: CJ
authors.lastname: Reback