I am looking for data ( gross sales, Selling price)on the sale of 
Radiation therapy linear accelerator service companies anywhere in the
country over the last five years.
Radiation Therapy accelerators are used in the treatment of cancer.
The major manufacturors are Varian, Seimens and Philips. As an
alternative to manufacturer service, There are a number of small
service companies ,called Third party service by the manufacturers
located around the country. I am looking for sales information on
these type companies.