Paul Douglas: "... Dia pergi ke Skotlandia dan belajar di bawah Lister...

"... Dia pergi ke Skotlandia dan belajar di bawah Lister ... ("Lister dianiaya oleh British Medical Association. Dia diancam dengan izinnya dicabut.") Namun di rumah sakit Lister hampir tidak ada yang meninggal akibat operasi karena Lister telah mengembangkan pencucian dan disinfektan asam karbolat. Keen kembali dari Skotlandia ... Dia disebut Listerite gila ..... Dia tidak diberi kesempatan untuk berlatih di setiap rumah sakit di Philadelphia."

--- Paul Douglas

Versi Bahasa Inggris

...He went to Scotland and studied under Lister...("Lister was persecuted by the British Medical Association. He was threatened with having his license revoked.") Yet in Lister's hospital virtually no one died as a result of operations because Lister had developed a carbolic acid wash and disinfectant. Dr. Keen came back from Scotland...He was referred to as a crazy Listerite.....He was denied an opportunity to practice in every hospital in Philadelphia.