Distinct endometrial protein profiles in spontaneous and stimulated cycles in women with poor ovarian response: A prospective case-crossover clinical trial - Dzhamilyat Abdulkhalikova; Helena Ban Frangež; Tanja Burnik Papler; Martin Štimpfel; Eda Vrtačnik Bokal; Vesna Šalamun (PLoS ONE, 2026)