Who has Brian D Smith collaborated with for his 'Grief 2 Growth' projects?

Brian D. Smith has collaborated with a number of people and organizations around Grief 2 Growth, especially through interviews, summits, and podcasts. From the available info here, a few collaborators include:

• Drs. Gloria and Heidi Horsley (interview on living with grief and finding growth)
• Roberta Grimes (twice on her “Seek Reality” podcast discussing Grief 2 Growth)
• Sue Frederick (a “mystical conversation” on grief and spiritual growth)

Are you asking about podcast guests specifically, or partners across all his grief projects (courses, talks, organizations)?