Impact of pre-operative frailty on hospital length of stay in major abdominal oncological surgeries: A prospective, observational study. - Sharma, Juhi; Vig, Saurabh; Malhotra, Rajeev; Thulkar, Sanjay; Mishra, Seema; Bhatnagar, Sushma (Indian Journal of Anaesthesia, 2026)