Its just anecdotal, I definitely sleep better the further I'm away from cell phones, cell towers and pulsed wifi routers. I've got a meter and I've used emf shielding clothes prior to addressing my bedroom. Its pretty hard to do decent studies on it since its so prevalent. Prone to quackery and people making quick bucks on it too.
You should check out better call Saul, main character is a lawyer who has a brother who lives with debilitating emf sensitivity, he is the only one who believes him though. They go really in depth about it for like 2 seasons