Nolen's analysis of Kulhman came in for criticism from believers. Lawrence Althouse, a physician, said that Nolen had attended only one of Kuhlman's services and did not follow up with all of those who said they had been healed there. Dr. Richard Casdorph produced a book of evidence in support of miraculous healings by Kuhlman. Hendrik van der Breggen, a Christian philosophy professor, argued in favor of the claims. Author Craig Keener concluded, "No one claims that everyone was healed, but it is also difficult to dispute that significant recoveries occurred, apparently in conjunction with prayer. One may associate these with Kathryn Kuhlman's faith or that of the supplicants, or, as in some of Kuhlman's teaching, to no one's faith at all; but the evidence suggests that some people were healed, even in extraordinary ways."