RT Journal Article SR Electronic T1 Food crisis escalates in Africa’s Sahel region JF Canadian Medical Association Journal JO CMAJ FD Canadian Medical Association SP E555 OP E556 DO 10.1503/cmaj.109-3315 VO 182 IS 12 A1 Lauren Vogel YR 2010 UL http://www.cmaj.ca/content/182/12/E555.abstract