1. (a) Binns W, James LF, Keeler RF, Balls LD (1968) Cancer Res 28:2323-2326
2. (b) Keeler RF (1978) Lipids 13:708-715
3. (c) James LF (1999) J Nat Toxins 8:63-80
4. (a) Cooper MK, Porter JA, Young KE, Beachy PA (1998) Science 280:1603-1607
5. (b) Incardona JP, Gaffield W, Kapur RP, Roelink H (1998) Development 125:3553-3562