Capillaries (1 in Fig. 5b) surrounded with elastin (2 in Fig. 5b) and collagen III (3 in Fig. 5b) and two MC populations characterized by low TPE-AF intensity (≈ 300 photons/mW) and longer τm (> 1,000 ps) (4 in Fig. 5b) as well as by high TPE-AF intensity (≈ 800 photons/mW) and a shorter τm (< 800 ps) (5 in Fig. 5b) are clearly visible in the TPE-FLIM image of the papilla. This evidence concerns the gene ELN and atrial fibrillation.