I saw it done by Rav Nosson Tzvi Cohen in Mir Yerushalayim in 1973. The bil rubin count of the patient was 29 when we started and 7 when we finished about 17 pigeons later. Instead of hospitalization, the patient was back n Bais Medrash in less than a week.
Rabbi Twersky of Pittsburgh did lab tests to discover and found that it not scientific, but a spiritual siyata dishmaya.