Follow along with the sources here.
For further research:
1) Read the full text of the RCA's pesak, which we cited, here.
2) Read R. Shlomo Brody's brief summary of this topic in his A Guide to the Complex: Contemporary Halakhic Debates, here.
3) Read R. Nehorai Ohana's extensive analysis of this topic, in his פסקי רפואה:אקטואליה רפואית בהלכה, here.