This is not well - acknowledged in the study, with an important exception saying wind turbine reports are biased higher because of mandatory reporting requirements that don't exist for other causes. (rabett.blogspot.ru)
In some jurisdictions, information received during religious confessions - which are considered highly confidential by churches - is considered privileged, and thus exempt from mandatory reporting requirements. (premierchristianity.com)
NSBA and its joint amici argue that mandatory reporting requirements exist to protect the safety of children by encouraging reports of suspected abuse. (nsba.org)