Roberts J M, Koff A, Polyak K, Firpo E, Collins S, Ohtsubo M, Massagué J
Department of Basic Sciences, Fred Hutchinson Cancer Research Center, Seattle, Washington 98104, USA.
Cold Spring Harb Symp Quant Biol. 1994;59:31-8. doi: 10.1101/sqb.1994.059.01.006.