Chang Kathleen, Petru Ann M, Lee Brian P
Division of Infectious Diseases, Children's Hospital & Research Center Oakland, 747 Fifty Second Street, Oakland, CA 94609, USA.
Pediatr Infect Dis J. 2007 Nov;26(11):1072-3, 1078-9. doi: 10.1097/INF.0b013e31812e5332.