Acknowledgments
This study was financed by National Centre of Science (Poland) within Harmonia 9 grant “Contagious neoplasia? The role of horizontal transmission of cancer cells in aetiology of disseminated neoplasia in clams from the Gulf of Gdańsk”, grant number: UMO-2017/26/M/NZ8/00478 and National Institutes of Health support to Michael Metzger (K22 CA226047) and Sam Hart (T32-GM007270, T32-HG000035).
We would like to thank Dr Justyna Świeżak (University of Gdańsk) for help in sample collection and processing, Marisa Yonemitsu (Pacific Northwest Research Institute and University of Washington) for laboratory assistance and guidance and Rachael Giersch (Pacific Northwest Research Institute) for help in manuscript editing.