title: Reply.
authors.affiliation: University of California, San Francisco, San Francisco, California. Electronic address: sean@ianchulev.com.
authors.forename: Tsontcho
authors.initials: T
authors.lastname: Ianchulev
authors.affiliation: Colorado Permanente Medical Group, Lafayette, Colorado.
authors.forename: David
authors.initials: D
authors.lastname: Litoff
authors.affiliation: Colorado Kaiser Permanente Health Plan, Wheat Ridge, Colorado.
authors.forename: Donna
authors.initials: D
authors.lastname: Ellinger
authors.affiliation: Colorado Permanante Medical Group, Lone Tree, Colorado.
authors.forename: Kent
authors.initials: K
authors.lastname: Stiverson
authors.affiliation: Oregon Health & Science University, Portland, Oregon.
authors.forename: Mark
authors.initials: M
authors.lastname: Packer