PT - JOURNAL ARTICLE AU - Christopher James Manning AU - Robert Cooke AU - Abdul Bari TI - Curious case of a concave cap AID - 10.1136/bcr-2018-227462 DP - 2019 May 01 TA - BMJ Case Reports PG - e227462 VI - 12 IP - 5 4099 - http://casereports.bmj.com/content/12/5/e227462.short 4100 - http://casereports.bmj.com/content/12/5/e227462.full SO - BMJ Case Reports2019 May 01; 12