In a Sept. 17 "Prescriptions," Timothy Noah described a stem cell transplant as an "operation." It's an intravenous procedure, more properly described as a "treatment." He also identified Rep. Henry Waxman, D.-Calif., chairman of the House Energy and Commerce committee, as chairman of its investigation subcommittee. That subcommittee is chaired by Rep. Bart Stupak, D.-Mich.

In the Sept. 17 "Press Box," Jack Shafer misspelled the names of slain Yale student Suzanne Jovin and cable-TV commentator Greta Van Susteren.

In the Sept. 16 "Explainer," Christopher Beam misspelled former Massachusetts Rep. Gerry Studds' name.

In the Sept. 15 "Explainer," Juliet Lapidos referred to "Thou shalt not take the name of the Lord thy God in vain" as the second commandment. Although that's true among Catholics and Lutherans, other Christian sects, as well as Jews, refer to it as the third.

In the Sept. 15 "Human Nature," William Saletan misidentified the initiative "Take Care New York 2012" as "Take Care New York 1012."

In a Sept. 14 "TV Club" entry, John Swansburg suggested that Mad Men character Don Draper might have preferred Johnnie Walker Blue Label to Johnnie Walker Red Label. Johnnie Walker Blue Label didn't exist in 1963, when the episode took place.

In the Sept. 10 "Science," Daniel Engber incorrectly described the nonpartisan ProCon.org as an advocacy group.

In the July 27 "Prescriptions," Timothy Noah incorrectly stated that delay of a necessary operation killed Otto Raddatz, an Illinois man who was dropped by his insurer after he was diagnosed with non-Hodgkins lymphoma and later reinstated after the state attorney general intervened. The state attorney general acted quickly enough that the operation was not delayed, and it proved successful. Raddatz's lymphoma killed him three years later.

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