Clinical Study "Common" Name (formal title)	Number of enrollees	Funding source (pharmaceutical company/National Institutes of Health [NIH])	Year complete	Primary publication	Full study treatment protocol/patient disposition
CRYO-ROP Multicenter trial of cryotherapy for retinopathy of prematurity: preliminary results. Cryotherapy for Retinopathy of Prematurity Cooperative Group	172 for 1988 study 254 for 2005 study	National Eye Institute (NEI)/ NIH (NCT00000133)	style="text-align: center;">2003	Cryotherapy for Retinopathy of Prematurity Cooperative Group. Multicenter trial of cryotherapy for retinopathy of prematurity: preliminary results. Cryotherapy for Retinopathy of Prematurity Cooperative Group. Pediatrics. 1988;81(5): 697-706. https://publications.aap.org/pediatrics/article-abstract/81/5/697/55219/Multicenter-Trial-of-Cryotherapy-for-Retinopathy Cryotherapy for Retinopathy of Prematurity Cooperative Group. 15-Year Outcomes Following Threshold Retinopathy of Prematurity. Final Results From the Multicenter Trial of Cryotherapy for Retinopathy of Prematurity. Arch Ophthalmol. 2005;123:311-318. https://jamanetwork.com/journals/jamaophthalmology/article-abstract/416903