Arguments found on the Net

There is moreover a specific biological time of the age: it is Lecomte of Nouy which realized, during the war of 14-18, which the wounds of the young casualties healed more quickly than those of oldest. It connected the physiological age and the speed of cicatrization by a function logarithmic curve.

22) Lecomte of Nouy P.: "Time and Life", 1 vol., Gallimard éd., Paris, 1936