Development of steroid profile quantification method in urine by LC-MS

Quantification of steroids in urine in the aim of fighting against doping in sports. The goal of the paper is to depict a steroidal module of an Athlete Biological Passport (ABP).
For now I only need one section of the introduction of my paper ! The title of the section is : STEROIDS. It is already written by another student in the previous year (see uploaded file: page 4 to 8) and I need you to write me a section for my paper’s introduction with a similar content but with out plagiarism. The sources are more or less the same, but additional sources can also be used. Please make sure you include the following sources in the uploaded file: number 15, 24 & 25