[1] Univ Texas Southwestern Med Ctr, Dept Dermatol, 5323 Harry Hines Blvd,Box 9190, Dallas, TX 75390 USA
[2] Univ Texas Southwestern Med Ctr, Dept Obstet & Gynecol, Dallas, TX 75390 USA
[3] Univ Texas Southwestern Med Ctr Dallas, Dept Emergency Med, Dallas, TX 75390 USA
[4] Texas Hlth Resources, Dept Emergency Med, Ft Worth, TX USA
[5] Univ Texas Southwestern Med Ctr, Dept Populat & Data Sci, Div Biostat, Dallas, TX 75390 USA
[6] Univ Texas Southwestern Med Texas, Dept Internal Med, Dallas, TX USA