In Kalcker Lo Esencial. Protocol Guide you will find specific information on each protocol in the use of CDS. Listed from A to Z, a multitude of diseases and possible guidelines to follow are named. No medical training of any kind is required to understand the guide and be able to carry out the protocols safely. The simple and direct language with which the author writes his books, makes it possible to reach a large number of people without there being a barrier due to the difficulty of its content.