@article{ETD,
      school = {M.P.H.},
      author = {Havel, Liska},
      url = {http://digitalcollections.ohsu.edu/record/7836},
      title = {Serum vitamin D and risk of back pain in older men},
      publisher = {Oregon Health and Science University},
      number = {ETD},
      doi = {https://doi.org/10.6083/M48914XJ},
      recid = {7836},
      address = {2016},
}