Stroke


 * importance of family history


 * areas with a low risk of stroke

State of the Nation: stroke statistics | Stroke Association
 * https://www.stroke.org.uk/resources/state-nation-stroke-statistics

Swiss sodium consumption is over 8 mg per day:
 * http://www.swissinfo.ch/eng/society/2-teaspoons-a-day_swiss-still-eat-too-much-salt/41771324

U.S. recommendations:
 * http://sodiumbreakup.heart.org/sodium-411/how-much-sodium-do-you-need/

Stroke rates per 100,000:
 * http://www.worldlifeexpectancy.com/cause-of-death/stroke/by-country/
 * 167	UNITED STATES	25.94
 * 172	SWITZERLAND	21.19