@article{ETD,
      school = {Ph.D.},
      author = {Butler, Timothy},
      url = {http://digitalcollections.ohsu.edu/record/7842},
      title = {Monitoring circulating-tumor DNA},
      publisher = {Oregon Health and Science University},
      number = {ETD},
      doi = {https://doi.org/10.6083/M4VD6XJB},
      recid = {7842},
      address = {2016},
}