[1
]
New York State Psychiatric Institute, Division of Substance Abuse, 1051 Riverside
Drive, New York, NY 10032, USA; Department of Psychiatry, College of Physicians and
Surgeons of Columbia University, 630 West 168th Street, New York, NY 10032, USA. Electronic
address: mak2102@columbia.edu.
[2
]
Department of Biostatistics, Columbia University, 722 West 168th Street, New York,
NY 10032, USA.
[3
]
Division of Biostatistics in the Department of Psychiatry, 722 West 168th Street,
New York, NY 10032, USA.
[4
]
New York State Psychiatric Institute, Division of Substance Abuse, 1051 Riverside
Drive, New York, NY 10032, USA; Department of Psychiatry, College of Physicians and
Surgeons of Columbia University, 630 West 168th Street, New York, NY 10032, USA.