As shown in many animals, they don't have super good genes to have their life extended, just change the expression of certain genes.
In 1965, at the ripe old age of 90, Jeanne sold her apartment.
Yvonne carries Maria's stick and is dressed fashionably while Maria, the coowner of the tissue store, is dressed in exotic dress.
Using a wheelchair, largely blind and deaf, she finally succumbed on 4 August 1997.
Those results are just indicators what might be positive or negative just 'in the average' and without regarding complex cross reactions between specific inner dispositions and outside conditions, which are sometimes very different from person to person and which are permanent changing.
Books such as , and all deal with this methodological question.