Evidence for an essential role of megalin in transepithelial transport of retinol. - Christensen,EI.; Moskaug,JO.; Vorum,H.; Jacobsen,C.; Gundersen,TE.; Nykjaer,A.; Blomhoff,R.; Willnow,TE.; Moestrup,SK. (J Am Soc Nephrol, 1999)