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Mark Chak
Mr. Mark Chak is an innovator and inventor of new products. He currently holds ten patents. He hopes that medical institutions will become interested in his new idea and work with ...view moreMr. Mark Chak is an innovator and inventor of new products. He currently holds ten patents. He hopes that medical institutions will become interested in his new idea and work with him on further development of this genius idea.
The purpose of this book is to help people live longer and healthier lives.view less