PT - JOURNAL ARTICLE AU - Bharat Hosur AU - Vivek Gupta AU - Chirag Kamal Ahuja TI - Fourth branchial fistula: a rare cause of persistent neck discharge in an adult AID - 10.1136/bcr-2018-227980 DP - 2018 Nov 01 TA - BMJ Case Reports PG - e227980 VI - 11 IP - 1 4099 - http://casereports.bmj.com/content/11/1/e227980.short 4100 - http://casereports.bmj.com/content/11/1/e227980.full SO - BMJ Case Reports2018 Nov 01; 11