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- [2] Echinacea and the common cold - Convincing evidence still lacking FORSCHENDE KOMPLEMENTARMEDIZIN UND KLASSISCHE NATURHEILKUNDE, 2001, 8 (02): : 111 - 112
- [3] Evidence concerning social capital and health inequalities is still lacking JOURNAL OF PUBLIC HEALTH MEDICINE, 2003, 25 (02): : 184 - 185
- [5] Evidence to back dementia screening is still lacking, committee says BMJ-BRITISH MEDICAL JOURNAL, 2015, 350