in 2001. Treatments There are no evidence-based treatments for ego-dystonic sexual orientation. As part of its assessment of the ICD-10's diagnostic categories related to sexual orientation, the World Health Organization's Working Group on the Classification of Sexual Disorders and Sexual Health conducted a thorough literature search and found no evidence that a person's concern about their sexual orientation requires any unique therapeutic interventions other than common treatments for distress, anxiety, depression, and other conditions. For people who are uncomfortable with or distressed by their sexual orientation or by experiencing same-sex attraction, evidence-based strategies for alleviating distress include "challenging negative stereotypes, seeking social support, and self-acceptance." Supportive interventions include gay affirmative psychotherapy, which helps lesbian, gay, and bisexual people examine and accept their sexual orientation and related sexual relationships, and lesbian, gay, and bisexual support groups, which can help counteract and buffer minority stress, marginalization, and isolation. The current guidelines of many mental health associations direct therapists to recognize that non-heterosexual orientations are not disorders; to understand the effects of stigma on lesbian, gay, and bisexual people; and to recognize that "sexual orientation change efforts" are ineffective and often harmful. In 2009, an American Psychological Association task force reported that offering appropriate therapeutic interventions to individuals who wish they could change their sexual orientation requires "therapist acceptance, support, and understanding of clients and the facilitation of clients' active coping, social support, and identity exploration and development, without imposing a specific sexual orientation identity outcome." Negative impacts of the diagnosis The ego-dystonic sexual orientation diagnostic category legitimized controversial sexual orientation change efforts, most notably the practice of conversion therapy, even as such practices were being increasingly scientifically debunked. In 2009, a research study revealed that 1 in 6 psychological therapists in the UK had helped clients in reducing their feelings of same-sex attraction or attempting to change their sexual orientation at some point in their career. The same year, an American Psychological Association task force conducted a systematic review of all available English-language peer-reviewed research literature on sexual orientation change efforts from 1960 to 2017 and found that such efforts are ineffective and likely to cause harm. Researchers have noted that even the ongoing existence of conversion therapy is partly due to the legacy of diagnostic criteria that allowed a pathological view of same-sex desire to persist long past the point when the international scientific community had concluded that such desires are