Please don't let the fact that I am a medical doctor and that I can write articles for medical magazines scare you off from taking the plunge. I do that because there are so many products out there that are made by people that are not medical doctors or medical technicians. Some are just making money off of the confusion by telling people that they must have some specific training to understand the specific product that they are being sold. These products are not the products for your training. You should always research the products before you buy them. I have included a sample of each product below and have also listed links to each of them on my training article. I have put this review into a spreadsheet. This is not a comprehensive list of all the products that are sold by the various brands. The products are organized by category of course. If you want to read more reviews or you want to see which one you should buy, please see my previous reviews and purchase links. This was my first time posting on Amazon so I was a little intimidated. However, I'm glad to say that the process was easy and I found that I liked the products and really enjoyed my first trip to Amazon.