PeerJ Author 205 Points Contributions by role Author 135 Preprint Author 70 Links 2 Contributions by subject area Epidemiology Oncology Public Health Respiratory Medicine Statistics Kamen P Simeonov PeerJ Author Summary Biotechnology Cell Biology Developmental Biology Molecular Biology Synthetic Biology Past or current institution affiliations University of Pennsylvania Work details MD-PhD Trainee University of Pennsylvania Perelman School of Medicine Websites Kamen Simeonov (personal) ORCID Google Scholar LinkedIn PeerJ Contributions Articles 1 Preprints 1 January 13, 2015 Lung cancer incidence decreases with elevation: evidence for oxygen as an inhaled carcinogen Kamen P. Simeonov, Daniel S. Himmelstein https://doi.org/10.7717/peerj.705 PubMed 25648772 November 12, 2014 - Version: 2 Lung cancer incidence decreases with elevation: evidence for oxygen as an inhaled carcinogen Kamen P. Simeonov, Daniel S. Himmelstein https://doi.org/10.7287/peerj.preprints.587v2