@article{doi:, author = {Logan, J. S}, title = {An autograph letter of Dr. Rene Laennec}, journal = {Anatol J Cardiol}, volume = {16}, number = {3}, pages = {230-232}, year = {2016}, doi = {}, note ={doi: }, URL = {https://dx.doi.org/}, eprint = {https://dx.doi.org/} }