Some data to help think up such effects: http://www.kidon.com/smoke/percentages3.htm http://www.kidon.com/smoke/percentages3.htm Differences in diet was an obv

Some data to help think up such effects: http://www.kidon.com/smoke/percentages3.htm http://www.kidon.com/smoke/percentages3.htm Differences in diet was an obvious idea, but it's not obvious to me what Japan and Israel might have in common.