@misc{indiciae0cb158c27995, title = {[A comparative study of electrocardiographs].}, author = {J Boter and B van Eijnsbergen and G J van Keulen and M Y Snoeck-de Waard and W Sterken}, year = {1973}, url = {https://pubmed.ncbi.nlm.nih.gov/4783880/}, note = {Source identifier: 4783880} }