title: The Zigzagging zeitgeist of health services research: Rapidly changing priorities in the field.
authors.affiliation: Department of Public Health, Weill Cornell Medical College, 402 East 67th Street, NY 10065, USA. Electronic address: amr2015@med.cornell.edu.
authors.forename: Andrew M
authors.initials: AM
authors.lastname: Ryan
authors.affiliation: Perelman School of Medicine and the Wharton School University of Pennsylvania, Blockley Hall, Rm 1204, 423 Guardian Drive, PA 19104-6021, USA. Electronic address: polsky@mail.med.upenn.edu.
authors.forename: Daniel E
authors.initials: DE
authors.lastname: Polsky
authors.affiliation: Department of Public Health, Weill Cornell Medical College, 402 East 67th Street, NY 10065, USA. Electronic address: map9069@med.cornell.edu.
authors.forename: Matthew J
authors.initials: MJ
authors.lastname: Press
authors.affiliation: Memorial Sloan-Kettering Cancer Center, 300 East 66th St., NY 10065, USA. Electronic address: bachp@MSKCC.ORG.
authors.forename: Peter B
authors.initials: PB
authors.lastname: Bach