1. Occupational Health Service; Centro Hospitalar de Lisboa Central; Lisbon; Portugal
2. Department of Anatomy; Institute of Medical Sciences; Banaras Hindu University; Varanasi; India
3. Pineal Research Laboratory; Department of Zoology; Banaras Hindu University; Varanasi; India
4. Department of Human Morphology and Developmental Biology; Semmelweis University; Budapest; Hungary