The smartphone camera approach is more ad hoc - users who want to take a pulse place their finger over the lens, which catches subtle colour changes that correspond to blood flow.The smartphone camera approach is more ad hoc - users who want to take a pulse place their finger over the lens, which catches subtle colour changes that correspond to blood flow.
Hello, my name is Jack Sparrow. I'm a 50 year old self-employed Pirate from the Caribbean.
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