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. 2022 Sep 7;39(12):3047–3061. doi: 10.1007/s11095-022-03363-2

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Fig. 2 — Scanning electron micrograph of cromoglycic acid (left) and nedocromil (right) particles. Reprinted with permission from references [6, 22]. Copyright 1989 & 1995 Elsevier.