- Advocates Protecting Children (APC)
- Alliance for Therapeutic Choice and Scientific Integrity (ATCSI), formerly National Association for Research and Therapy of Homosexuality (NARTH)
- American College of Pediatricians (ACPEDS)
- Cardinal Support Network (CSN)
- Catholic Medical Association (CMA)
- Christian Medical & Dental Associations (CMDA)
- Cochrane Collaboration
- Cochrane Belgium
- Cochrane Colombia
- Cochrane Ireland
- Explore Consultation
- Gender: A Wider Lens
- Gender Exploratory Therapy Association (GETA)
- Genspect
- GRADE Working Group (GWG)
- Institute for Comprehensive Gender Dysphoria Research (ICGDR)
- Integrated Psychotherapy Clinic
- Killarney Group
- McMaster University
- McMaster University Department of Health Research Methods, Evidence and Impact (HEI)
- Moms for Liberty (M4L)
- National Catholic Bioethics Center
- Our Duty
- Parents of ROGD Kids (PROGDK)
- Parents with Inconvenient Truths about Trans (PITT)
- Partners for Ethical Care (PEC)
- Roman Catholic Church (RCC)
- Society for Evidence-Based Gender Medicine (SEGM)
- Transgender Trend
- Transparency in Education
- United States Conference of Catholic Bishops (USCCB)
- Wider Lens Consulting (WLC)