RT Journal Article SR Electronic T1 Hypercalcemia and a “no observed adverse effect level” intake of vitamin D JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E768 OP E768 DO 10.1503/cmaj.72512 VO 191 IS 27 A1 Reinhold Vieth YR 2019 UL http://www.cmaj.ca/content/191/27/E768.abstract