RT Journal Article SR Electronic T1 Arthur Ferguson MacCallan: trachoma pioneer in Egypt 1903–1923 JF British Journal of Ophthalmology JO Br J Ophthalmol FD BMJ Publishing Group Ltd. SP 577 OP 579 DO 10.1136/bjophthalmol-2014-306527 VO 99 IS 5 A1 MacCallan, Michael YR 2015 UL http://bjo.bmj.com/content/99/5/577.abstract AB