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Fig. 1 | Respiratory Research

Fig. 1

From: Loss of skin elasticity is associated with pulmonary emphysema, biomarkers of inflammation, and matrix metalloproteinase activity in smokers

Fig. 1

Measurement of facial wrinkling. Daniell system for scoring the appearance of facial wrinkles in the crow’s-foot area: 1) Essentially unwrinkled. 2) Between 2 and 6 wrinkles ≤3 cm in length. 3) Several prominent wrinkles 3-4 cm in length. 4) Wrinkles ≥5 cm in length, may extend onto cheek area. 5) Prominent wrinkles extending from crow’s-foot area over cheeks and forehead. 6) Profound wrinkling over most of the face

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