RT Journal Article SR Electronic T1 Five-year surveillance of chickenpox in Qassim, Central Saudi Arabia JF Saudi Medical Journal JO Saudi Med J FD Prince Sultan Military Medical City SP 808 OP 810 VO 28 IS 5 A1 Jahan, Saulat A1 Al-Saigul, Abdullah M. A1 Hamed, Shamandy A. YR 2007 UL http://smj.org.sa/content/28/5/808.abstract AB