Health Care Resource Utilization for Esophageal Cancer Using Proton versus Photon Radiation Therapy oleh Steven H. Lin, MD, PhD, Kaiping Liao, PhD, Xiudong Lei, PhD, Vivek Verma, MD, Sherif Shaaban, MD, Percy Lee, MD, Aileen B. Chen, MD, Albert C. Koong, MD, PhD, Wayne L. Hoftstetter, MD, Steven J. Frank, MD, Zhongxing Liao, MD, Ya-Chen Tina Shih, PhD, Sharon H. Giordano, MD, Grace L. Smith, MD, PhD, MPH