SOURCE: Thomson Scientific Hot Papers Database NB. Only papers indexed by Thomson Scientific since November 2003 are tracked. A † dagger indicates that the paper was not ranked in the Top Ten during the last period. In the event that two or more papers collected the same number of citations in the most recent bimonthly period, total citations to date determine the rankings.

*Where publisher permissions have been granted, full-text copies of the above pages can be obtained from Thomson Scientific via Document Solution^sm, Thomson's document delivery service. For pricing information contact the Document Solution Department (Phone 800-603-4367, Fax 856-787-1679, e-mail service@isidoc.com, or on the internet, visit http://www.scientific.thomson.com/isi/products/ids) and refer to the TGA number and page number of the article as noted in the article you have read.