Ramesh Kumar; Haidri, F. R.; Heeralal; Zafar, B. COMPARISON OF CHULA FORMULA WITH STANDARD 21 23 RULE FOR ESTIMATION OF OROTRACHEAL TUBE DEPTH IN INTUBATED ADULT PATIENTS: A SINDH INSTITUTE OF UROLOGY AND TRANSPLANTATION EXPERIENCE. J Ayub Med Coll Abbottabad 2023, 35, 114-117.