I am grateful to Sameer Gupta and Vamanan Namboodiri for continuous interaction and suggestions during the preparation of the manuscript. I am also thankful to Pearson Education for bringing out the revised edition in an elegant format.
Finally, I am grateful to Sushil Mittal (wife) for love, affection and for being a constant source of support, and family members—Dr Shilpi Kondaskar (daughter), Dr Atul Kondaskar (son-in-law), Shalin Mittal (son) Needhi Mittal (daughter-in-law) and grandchildren Arushi Kondaskar and Atharv Raj Mittal for their love and affection.
Raj Kamal