Corrections and clarifications

In the Feb. 4 editorial, “The war on waste” (p. 24), the quote “Ninety percent of C-sections are unnecessary; 80% of stents are inappropriate; 30% of people with cancer get the wrong treatment,” referred to a Walmart survey of its employees’ healthcare expenses and should have been attributed to Lucy Liu, manager of the Practicing Wisely program at Oliver Wyman, a healthcare consultancy.