“…In this study, the present status of the patients varied, 28 patients having intermittent symptoms and 41 persistent cough and sputum. As in most other series (Diamond and van Loon, 1942;Field, 1949;Strang, 1956;Williams and O'Reilly, 1959), the disease process began in the majority of patients under 5 years of age. Forty-nine were treated medically and 20 surgically.…”