IL1A and myocardial ischemia: Except for IL-1α, none of the analyzed humoral factors in our study appeared to fulfill the criteria for a transfer factor of cardioprotection by RIC (increase in the factor’s concentration after the RIC procedure and before myocardial ischemia as well as association with reduced myocardial ischemia/reperfusion injury), and we thus add another mostly negative study to the so far elusive search for RIC ́s transfer factor17.