1. Center for Tobacco Control Research, Birkevej 17, 5230 Odense, Denmark
2. Laboratory of Genomics and Molecular Biomedicine, August Krogh Building Department of Biology, University of Copenhagen, Universitetsparken 13, 2100 Copenhagen, Denmark
3. BGI-Research, BGI-Shenzhen, Shenzhen 518120, China
4. Institute of Metagenomics, Qingdao-Europe Advanced Institute for Life Sciences, BGI-Qingdao, Qingdao 166555, China
5. Department of Radiation Oncology, Stanford University, Stanford, CA 94305, USA
6. Department of Pathology, Laboratory Medicine, University of Wisconsin Hospital and Clinics, Madison, WI 53792, USA
7. Department of Pathology, San Cecilio University Hospital, 18071 Granada, CP, Spain
8. Department of Pathology, School of Medicine, University Granada, 18071 Granada, CP, Spain