The Dutch players were more likely to be smokers perhaps?
Other prominent Dutch players of the era-Barry Hulshoff, Jan Van Beveren and Willy Van Der Kuijlen all died before their 75th birthday.
Only 2 starters from Ajax's 1971 European cup team are left: the goalie Heinz Stuy(born in Germany) and winger Sjaak Swart. The used substitutes Arie Haan and Horst Blankenburg(a German) are both still alive. ALL of the Panathinaikos starting 11 are alive if Wikipedia is to be believed.