It should be noted that Jok had been receiving serious interest from major schools before his surgery. During and immediately after the surgery Fran stayed with him which is what led to him choosing Iowa. That and it probably didnt hurt that I believe Jeff Horner was his high school coach
Also, right before Jok picked Iowa, Wisconsin was trying to get him to visit and Bruce Webber was in contact with him both at Illinois pre-injury and then at Kansas State post-injury.
Also, and I'm not sure its trustworthy, but ESPN recruiting says Jok had offers from Iowa State, Xavier, Clemson, Creighton and Illinois as well.