Doctors Invent New Way to 3D Print Inside the Body
Researchers have developed a new way to 3D-print inside the human body using a special bioink and ultrasound waves.
More accurate to say "engineers invent new way to 3d print inside of the body". Granted, those engineers are doctors (PhD), but PhD engineers don't call themselves doctors.
I can't have that credit going to MD's, lol.