Response of cluster headache to psilocybin and LSD
RA Sewell, JH Halpern, HG Pope - Neurology, 2006 - AAN Enterprises
MDMA (“Ecstasy”) abuse and high-risk sexual behaviors among 169 gay and bisexual men
RL Klitzman, HG Pope Jr… - American Journal of …, 2000 - Am Psychiatric Assoc
Residual neuropsychological effects of illicit 3, 4-methylenedioxymethamphetamine (MDMA) in individuals with minimal exposure to other drugs
JH Halpern, HG Pope Jr, AR Sherwood, S Barry… - Drug and alcohol …, 2004 - Elsevier