Applicable links  ii https://shop.nist.gov/ccrz__ProductDetails?sku=2927&cclcl=en_US   iii https://www.prospecbio.com/igf1_n15_human  iv https://shop.nist.gov/ccrz__ProductDetails?sku=2926&cclcl=en_US         ABP Operating Guidelines  – Version 9.0 – July 2023  Page 39/91 7.0 Bibliography  1.