Radio-metal cross-linking of alginate hydrogels for non-invasive in vivo imaging.

"Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper. The authors have no relevant affiliations or financial involvement with any organization or entity with a financial interest in or financial conflict with the subject matter or materials discussed in the manuscript apart from those disclosed."

"PS Patrick acknowledges funding by the UK Regenerative Medicine Platform, Safety Hub grant (MRC: MR/K026739/1), and MRC grant MR/R026416/1. JC Bear thanks the Ramsay Memorial Trust for a Fellowship. TL Kalber is funded by an EPSRC Early Career Fellowship (EP/L006472/1). MF Lythgoe receives funding from the Medical Research Council (MR/J013110/1); King's College London and the UCL Comprehensive Cancer Imaging Centre CR-UK & EPSRC, in association with the MRC and DoH (England); the National Centre for the Replacement, Reduction and Refinement of Animal in Research (NC3Rs); Eli Lilly and Company. DJ Stuckey is supported by a British Heart Foundation intermediate basic science research fellowship (FS/15/33/31608), BHF Centre for Regenerative Medicine grant RM/17/1/33377, MRC grant MR/R026416/1, and Wellcome Trust multi-user equipment grant 212937/Z/18/Z. HE Fitzke acknowledges funding from the BBSRC London Interdisciplinary Doctoral (LIDo) Consortium (BB/M009513/1). We would like to Thank Dr Mark Turmaine (UCL Biosciences) for electron microscopy and sample preparation, and Chris Pope and Xiao Xiao Han for assistance with subcutaneous implantations. P. Stephen Patrick: Conceptualization, Methodology, Formal analysis, Investigation, Supervision, Writing - original draft, Writing - review & editing, Visualization, Project administration, Funding acquisition. Joseph C. Bear: Methodology, Formal analysis, Investigation, Data curation, Writing - review & editing, Visualization. Heather E. Fitzke: Investigation, Writing - review & editing. May Zaw-Thin: Investigation, Writing - review & editing. Ivan P. Parkin: Supervision, Writing - review & editing. Mark F. Lythgoe: Supervision, Writing - review & editing. Tammy L. Kalber: Investigation, Writing - review & editing. Daniel J. Stuckey: Conceptualization, Methodology, Investigation, Supervision, Writing - review & editing, Funding acquisition."