@misc{indiciae6032dbca7e40, title = {[The 9-year-old child. Epidemiological study].}, author = {W Bettschart and F Favez and R Henny and M Jeannin and M Pfaehler and P Piolino and F Poget}, year = {1980}, url = {https://pubmed.ncbi.nlm.nih.gov/7232597/}, note = {Source identifier: 7232597} }