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Synapse has enriched 5 closely related papers on similar clinical questions. Consider them for comparative context:

1. 1Quantum electrodynamical corrections to the fine structure of helium1974 · 2,924 citations
2. 2Relativistic<i>ab initio</i>CI study of the<i>X</i>¹Σ⁺and<i>A</i>¹Σ⁺states of the AgH molecule1987 · 91 citations
3. 3Foundations of the relativistic theory of many-electron atoms1980 · 823 citations
4. 4Relativistic electronic-structure calculations employing a two-component no-pair formalism with external-field projection operators1986 · 2,496 citations
5. 5On the Dirac Theory of Spin 1/2 Particles and Its Non-Relativistic Limit1950 · 2,187 citations