Extracellular Nicotinamide Phosphoribosyltransferase Is a Component of the Senescence-Associated Secretory Phenotype oleh Chisaka Kuehnemann, Chisaka Kuehnemann, Kang-Quan Hu, Kayla Butera, Sandip K. Patel, Joanna Bons, Birgit Schilling, Cristina Aguayo-Mazzucato, Christopher D. Wiley