StemChecker: a web-based tool to discover and explore stemness signatures in gene sets. - José P. Pinto; Ravi Kiran Reddy Kalathur; Daniel V. Oliveira 001; Tânia Barata; Rui S. R. Machado; Susana Machado; Ivette Pacheco-Leyva; Isabel Duarte; Matthias E. Futschik (Nucleic Acids Res., 2015)