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'essential': [156], 'for': [157, 178], 'initiation': [159], 'differentiation.': [163], 'Thus,': [164], 'co-activation': [165], 'Zic1,': [169], 'concert': [171], 'with': [172], 'Wnt,': [173], 'plays': [174], 'a': [175], 'decisive': [176], 'role': [177], 'correct': [185], 'place': [186]}, 'cited_by_api_url': 'https://api.openalex.org/works?filter=cites:W1993176607', 'counts_by_year': [{'year': 2024, 'cited_by_count': 4}, {'year': 2023, 'cited_by_count': 5}, {'year': 2022, 'cited_by_count': 8}, {'year': 2021, 'cited_by_count': 9}, {'year': 2020, 'cited_by_count': 9}, {'year': 2019, 'cited_by_count': 10}, {'year': 2018, 'cited_by_count': 15}, {'year': 2017, 'cited_by_count': 13}, {'year': 2016, 'cited_by_count': 7}, {'year': 2015, 'cited_by_count': 17}, {'year': 2014, 'cited_by_count': 13}, {'year': 2013, 'cited_by_count': 14}, {'year': 2012, 'cited_by_count': 15}], 'updated_date': '2025-01-10T17:17:40.459963', 'created_date': '2016-06-24'}