A man came to a dental therapy clinic with complaints of isolated transversal furrows on the crowns of his front and lateral teeth. The furrows were detected immediately after the teeth eruption. In his childhood, in the age of under a year, he had frequent acute respiratory viral infections. Objectively, the crowns of teeth 16, 11, 21, and 26 have a single indentation (a band) in their middle within the enamel. The furrows do not stain with methylene blue. What is the most likely diagnosis in this case?