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International Journal of Rheumatology
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International Journal of Rheumatology
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2011
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Article
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Fig 1
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Review Article
PDE-5 Inhibitors in Scleroderma Raynaud Phenomenon and Digital Ulcers: Current Status of Clinical Trials
Figure 1
Chemical structures of the three available PDE-5Is [
4
].
(a)
(b)
(c)