[1] Univ Oklahoma, Hudson Coll Publ Hlth, Dept Biostat & Epidemiol, Hlth Sci Ctr, 801 NE 13th St, Oklahoma City, OK 73104 USA
[2] Univ Oklahoma, Coll Med, Hlth Sci Ctr, Oklahoma City, OK 73104 USA
[3] Univ Oklahoma, Robert M Bird Hlth Sci Lib, Hlth Sci Ctr, Oklahoma City, OK 73104 USA
[4] Univ Oklahoma, Coll Med, Dept Family & Prevent Med, Hlth Sci Ctr, Oklahoma City, OK 73104 USA