RT Journal Article SR Electronic T1 Retropharyngeal phlegmon and cervical osteomyelitis after upper gastrointestinal endoscopy: a rare consequence of a routine procedure JF BMJ Case Reports JO BMJ Case Reports FD BMJ Publishing Group Ltd SP e247977 DO 10.1136/bcr-2021-247977 VO 15 IS 3 A1 Kishan Rajdev A1 Shayan Shahidi A1 Samantha Goh A1 Leonard Liew YR 2022 UL http://casereports.bmj.com/content/15/3/e247977.abstract AB