1. Alevisos B, Hatzitaskos P, Stefanis C (1989) Use and abuse of tranquillizers in Greece. In Piotrowski A, Leder S, Gawronska B (eds) Alcoholism and other dependencies. Polish Psychiatric Assoc, Warsaw, pp 20?24
2. Andersen R, Kravits J, Anderson OW (eds) (1975) Equity in health services: empirical analyses in social policy. Ballinger, Cambridge
3. Bridges K, Goldberg D, Evans B, Sharpe T (1991) Determinants of somatization in primary care. Psychol Med 21: 473?483
4. Brown G, Harris T (1978) Social origins of depression: a study of psychiatric disorder in women. Tavistock, London
5. Cohen J (1960) A coefficient of agreement for nominal scales. Educ Psychol Meas 20: 36?37