Chemical Fingerprint of Zn–Hydroxyapatite in the Early Stages of Osteogenic Differentiation - Alessandra Procopio; Emil Malucelli; Alexandra Pacureanu; Concettina Cappadone; Giovanna Farruggia; Azzurra Sargenti; Sara Castiglioni; Davide Altamura; Andrea Sorrentino; Cinzia Giannini; Eva Pereiro; Peter Cloetens; et al. (ACS Central Science, 2019)