K. N. Babu and M. Divakaran, Indian Institute of Spices Research, India;
P. N. Ravindran, Centre for Medicinal Plants Research, India; and
M. H. Mirjalili, Shahid Beheshti University, Iran and
P. Pushpangadan and S. K. Tewari, National Botanical Research
P. N. Ravindran, Centre for Medicinal Plants Research, India and