ArrayExpress update - trends in database growth and links to data analysis tools. - Gabriella Rustici; Nikolay Kolesnikov; Marco Brandizi; Tony Burdett; Miroslaw Dylag; Ibrahim Emam; Anna Farne; Emma Hastings; Jon C. Ison; Maria Keays; Natalja Kurbatova; James Malone; et al. (Nucleic Acids Res., 2013)