RT Journal Article SR Electronic T1 ā€˜Sā€™ means manufacturer-sponsored symposium JF Drug and Therapeutics Bulletin JO Drug Ther Bull FD BMJ Publishing Group Ltd SP 44 OP 44 DO 10.1136/dtb.29.11.44 VO 29 IS 11 YR 1991 UL http://dtb.bmj.com/content/29/11/44.abstract AB Since 1983 we have used the prefix ā€˜Sā€™ to identify, where possible, references to the proceedings of symposia sponsored by a manufacturer (DTB 1983; vol 21 page 24). These often appear as supplements of a learned journal and frequently receive less vigorous peer review than material in the regular issues of the same journal. We would be interested to hear from readers whether they find this useful.