Evaluation of Pre and Post-operative Pulmonary Artery Pressures in Children with Adenotonsillar Hypertrophy and Correlation with Chronicity: A Prospective Study on 50 Children. - Goel K; Bhagat S; Sharma DK; Yadav V; Verma P; Rajdev S (Indian journal of otolaryngology and head and neck surgery : official publication of the Association of Otolaryngologists of India, 2024)