> I recall hearing that rapid transitions *can* be fatal. Magnitude of 'can= ' > unknown. Haven't followed the links Russell provided, but I am aware that a lot of c= are was required in feeding the survivors of Nazi concentration camps. A ve= ry carefully crafted diet was required as they were so starved. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .