RT Journal Article SR Electronic T1 Subclinical pneumonia in infants due to Chlamydia trachomatis. JF The British Journal of Venereal Diseases JO Br J Vener Dis FD BMJ Publishing Group Ltd SP 213 OP 214 DO 10.1136/sti.57.3.213-a VO 57 IS 3 A1 M R Hammerschlag YR 1981 UL http://sti.bmj.com/content/57/3/213.2.abstract AB