To the Editor: Owan et al.¹ and Bhatia et al.² (July 20 issue) suggest that the rate of survival among patients who have heart failure with preserved ejection fraction may be similar to that among patients with systolic heart failure. Although neither ...

To the Editor: Parker et al. (Aug. 3 issue)¹ describe the largest documented outbreak of measles in the United States since 1996, which is of considerable epidemiologic interest. It is surprising that few of the cases were confirmed by laboratory ...

To the Editor: As a general practitioner in England, I and the practice in which I work were directly affected by the changes made in 2004 by the introduction by the National Health Service of a pay-for-performance contract for family practitioners, as ...

To the Editor: In the table about congenital diarrheal disorders in the Perspective by Binder (July 20 issue),¹ congenital sodium diarrhea is attributed to mutations in the gene encoding the sodium–hydrogen exchanger (NHE) isoform 3 (SLC9A3, also known ...

To the Editor: We report two cases of hypomagnesemic hypoparathyroidism associated with the use of proton-pump inhibitors, in which patients presented with carpopedal spasm in association with severe hypomagnesemia and hypocalcemia without an appropriate ...