Plz correct the mistakes in my translation - thanks?

He participated in the trainings and conferences organised by the ministry of health, the office for registration of medical products, medical devices and biocides, by the main pharmaceutical inspectorate and the health care policy institute (attached to the medical university in Łódź).he is a member of the polish pharmaceutical society (since 1986), of the society for nice clinical practice in poland and a co-organiser of some all-poland scientific conferences.he is also a member of the international health economics association (ihea) and took an active part in the jobs of the 5th international congress in 2005.he is the author of two publications about pharmaeconomics published in the magazines which are a force to be reckoned with scientific environment.
Answer
It is perfect. here are some small but necessary changes.1) he participated in training and conferences organised...2) the ministry of health; by the office for registration. of medical products, medical devices and biocides; by the main pharmaceutical inspectorate and by the health care policy institute...3) k an active part in the tasks of the fifth international...4) author of two articles on pharmaeconomics, which appeared in major scientific journals.