Uric acid is decreased before an attack of gout and increased afterward, but its etiologic relation is still uncertain.
Muscular overwork is to be reckoned with as an etiologic factor.
The paper shows the etiologic relation of Streptococcus viridans rather than the value of vaccines.
Syphilis is one of the most important of the etiologic factors in the production of arteriosclerosis.
Its relationship to scurvy cannot, therefore, at the present time, be discussed from an etiologic viewpoint.
In regard to scurvy, there may well be other etiologic factors, but they are of a secondary character.
Results of this kind show that there must be a relationship between the etiologic factors of scurvy and of beriberi.