Before revision: For example, the subject may be revealed to (a) HIV, (b) be unresponsive to existing drugs, (c) learn of an experimental study, but (d) doesn't know if it will work.
After revision: haveFor example, the subject may be revealed to (a) HIV, (b) be unresponsive to existing drugs, (c) learn of an experimental study, but (d) doesn't know if it will work.