Sentence:  The Mecholyl and noradrenalin tests applied with certain precautions are reliable indicators of this central autonomic balance , but for the sake of <WSD>correlating</WSD> autonomic and clinical states , and of studying the effect of certain therapeutic procedures on central autonomic reactions , additional tests seem to be desirable . 
Meaning of the word marked with <WSD> tags:  to bear a reciprocal or mutual relation