PT - JOURNAL ARTICLE AU - Derek S. Tsang AU - Samir Patel TI - Proton beam therapy for cancer AID - 10.1503/cmaj.190008 DP - 2019 Jun 17 TA - Canadian Medical Association Journal PG - E664--E666 VI - 191 IP - 24 4099 - http://www.cmaj.ca/content/191/24/E664.short 4100 - http://www.cmaj.ca/content/191/24/E664.full SO - CMAJ2019 Jun 17; 191