There is also research suggesting that some treatments might be harmful. Indeed, "if psychotherapy is powerful enough to do good, it may be powerful enough to do harm". Some psychotherapies can be labeled as unhelpful, meaning they give no assistance, while others fall under the category of harmful, meaning they are actually damaging or dangerous to the patient. When identifying a "harmful" treatment it is important to note the distinction between "harm that can be caused by a disorder and harm that can be caused by the application of a treatment". The negative outcomes of some psychotherapies are becoming an alarming reality in the field of clinical psychology. Studies have shown that individuals exhibited negative responses to treatment in some substance abuse work, some types of grief therapy, and certain therapeutic techniques with trauma and PTSD patients. While those studies that support the Dodo bird verdict focus on the importance of building a client–therapist relationship, some studies have "identified a number of other relationship factors that may interfere with or negatively impact therapeutic change". The emerging evidence to the effect that there are possibly harmful psychotherapies is not only contradictory to the "all therapies are equal" stance of the Dodo bird verdict, but may also point out problems implicating the APA's Code of Ethics. Many meta-analyses show that there are treatments that do yield more positive outcomes for specific disorders. However, proof that some treatments actually harm patients instead of helping them further erodes support for the Dodo bird verdict.