Millar J G, Valacer D J, Stavola J J, Shanahan E, Di Maio M F
Department of Pediatrics, Cornell University Medical College, New York, New York, USA.
Pediatr Pulmonol. 1997 Jan;23(1):62-5. doi: 10.1002/(sici)1099-0496(199701)23:1<62::aid-ppul8>3.0.co;2-r.