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. Author manuscript; available in PMC: 2013 Nov 1.
Published in final edited form as: Adv Drug Deliv Rev. 2012 May 1;64(14):1547–1568. doi: 10.1016/j.addr.2012.04.005

Figure 4.

Figure 4

Coated microneedles made of metal and polymer after (a,c,d,f,g,i,k) and before (b,e,h,j,l) coating.. Images reproduced with permission from references (a,b) [90], (c) [51], (d,e) [91], (f) [96], (g,f) [98], (i,j) [229], and (k,l) [99].