List five ethical concerns from below case study that need to be taken into account.

"Depression is associated with lowered work functioning, including absences, impaired productivity, and decreased job retention. Few studies have examined depression symptoms across a continuum of severity in relationship to the magnitude of work impairment in a large and heterogeneous patient population, however. We assessed the relationship between depression symptom severity and productivity loss among patients initiating treatment for depression. Data were obtained from employees from DIAMOND (Depression Improvement Across Minnesota: Offering a New Direction). It was critical to conceal the purpose of the experiment to ensure that participants are objective. For the purpose consistency, the researchers ensured the same participants contribute to research until the study was concluded as participants could not decide to drop out of the study. Patients newly started on antidepressants were surveyed with the Patient Health Questionnaire 9-item screen (PHQ-9), a measure of depression symptom severity; the Work Productivity and Activity Impairment (WPAI) questionnaire, a measure of loss in productivity; and items on health status and demographics. We analyzed data froth the 771 patients-who reported being currently employed. The personal information of the patients is included in order to ensure transparency of the study and to dispel the stigma associated to depression. General linear models adjusting for demographics and health status showed a significant linear, monotonic relationship between depression symptom severity and productivity loss: with a very 1-point increase in PHQ-9 score, patients experienced an additional mean productivity loss of 1.65%."