LeGrys V A, Retsch-Bogart G Z
Division of Clinical Laboratory Science, School of Medicine, University of North Carolina at Chapel Hill 27599-7145, USA.
Pediatr Pulmonol. 1997 Oct;24(4):296-7. doi: 10.1002/(sici)1099-0496(199710)24:4<296::aid-ppul10>3.0.co;2-5.