Sensational site: the sodium pump ouabain-binding site and its ligands.

Cardiotonic steroids (CTS), used by certain insects, toads, and rats for protection from predators, became, thanks to Withering's trailblazing 1785 monograph, the mainstay of heart failure (HF) therapy. In the 1950s and 1960s, we learned that the CTS receptor was part of the sodium pump (NKA) and that the Na/Ca exchanger was critical for the acute cardiotonic effect of digoxin- and ouabain-related CTS. This "settled" view was upended by seven revolutionary observations.

Correction: Whose shoulders is health research standing on? Determining the key actors and contents of the prevailing biomedical research agenda.

[This corrects the article DOI: 10.1371/journal.pone.

Laparoscopic Heller myotomy with Toupet fundoplication: revisiting GERD in treated achalasia.

Introduction: With the advent of the laparoscopic era in the 1990s, laparoscopic Heller myotomy replaced pneumatic dilation as the first-line treatment for achalasia. An advantage of this approach was the addition of a fundoplication to reduce gastroesophageal reflux disease (GERD). More recently, Peroral Endoscopic Myotomy has competed for first-line therapy, but the postoperative GERD may be a weakness.