At Endell, Anderson and the hospital pathologist, Helen Chambers, pioneered a new method of treating septic wounds, an antiseptic ointment called BIPP (bismuth, iodoform, and paraffin paste). The paste had been invented by James Rutherford Morison. After positive results from some initial tests by Anderson, Morison asked her and Chambers to run a larger trial of BIPP in 1916. Anderson published case studies in "The Lancet," concluding that this method saved patients pain and was better than the Carrel-Dakin method, which used a more powerful antiseptic but had to be frequently reapplied to be effective. Since bandages could be left on for longer, the BIPP method reduced time spent changing bandages by as much as 80%. BIPP was widely adopted by surgeons for the rest of the war, although opinion among doctors remained divided as to the best method for wound treatment. Despite continued debate, BIPP was also used in the Second World War and continues to be in use today in ear, nose, throat, maxillofacial, and neurosurgery procedures.