PT - JOURNAL ARTICLE AU - Greg Basky AU - Lauren Vogel TI - XE, XD & XF: what to know about the Omicron hybrid variants AID - 10.1503/cmaj.1095998 DP - 2022 May 09 TA - Canadian Medical Association Journal PG - E654--E655 VI - 194 IP - 18 4099 - http://www.cmaj.ca/content/194/18/E654.short 4100 - http://www.cmaj.ca/content/194/18/E654.full SO - CMAJ2022 May 09; 194