Microsporidia and Its Relation to Crohn's Disease. A Retrospective Study. - Andreu-Ballester, Juan C.; Garcia-Ballesteros, Carlos; Amigo, Victoria; Ballester, Ferran; Gil-Borrás, Rafael; Catalán-Serra, Ignacio; Magnet, Angela; Fenoy, Soledad; Aguila, Carmen del; Ferrando-Marco, Jose; Cuéllar, Carmen (PLoS ONE, 2013)