|Other Retailer||Price Checked Time||Their Price in AUD||Our Price|
|Amazon UK||3 days ago||43.06||$24.88||You save $18.18|
|Amazon US||yesterday||33.94||$24.88||You save $9.06|
|Book Depository US||today||26.54||$24.88||You save $1.66|
William G. Crook, MD, received his medical education at the University of Virginia, the Pennsylvania Hospital, Vanderbilt, and Johns Hopkins. He is an Emeritus Fellow of the American Academy of Pediatrics; the American College of Allergy, Asthma and Immunology; and the American Academy of Environmental Medicine.