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(a1) The distribution of dosage forms of marketed new oral sustained release drugs; (a2) Evolution of oral sustained release preparations. (b1) The distribution of dosage forms of marketed new inhalation drugs: spray; powder; aerosol; (b2) Evolution of new inhalation drugs. (c1) The distribution of dosage forms of marketed new transdermal patches: drug in reservoir, drug in matrix and drug in adhesive; (c2) Evolution of new transdermal patches.
