Therefore, if someone wants to know something about these persons or other physicians, one can refer to this book. Since, in conformity with the specified plan, there are different articles in this book, it is necessary a variety of authors who study about the history of medicine or are interested in this subject in different part of the world get familiar with it. The first volume of the book was published in 2011[3][needs update], while the second volume is expected in the upcoming period.[4]