Protestant translations (Lutheran, Anglican, Calvinist) use the Hebrew numbering, but other Christian traditions vary: Catholic official liturgical texts, such as the Roman Missal, use the Greek numbering Modern Catholic translations often use the Hebrew numbering (noting the Greek number) Eastern Orthodox and Eastern Catholic translations use the Greek numbering (noting the Hebrew number) The variance between Masorah and Septuagint texts in this numeration is likely enough due to a gradual neglect of the original poetic form of the Psalms; such neglect was occasioned by liturgical uses and carelessness of copyists. It is generally admitted that Psalms 9 and 10 (Hebrew numbering) were originally a single acrostic poem, wrongly separated by Massorah and rightly united by the Septuagint and the Vulgate. Psalms 42 and 43 (Hebrew numbering) are shown by identity of subject (yearning for the house of Yahweh), of metrical structure and of refrain (comparing Psalms 42:6, 12; 43:5, Hebrew numbering), to be three strophes of one and the same poem. The Hebrew text is correct in counting as one Psalm 146 and Psalm 147. Later liturgical usage would seem to have split up these and several other psalms. Zenner combines into what he deems were the original choral odes: Psalms 1, 2, 3, 4; 6 + 13; 9 + 10; 19, 20, 21; 56 + 57; 69 + 70; 114 + 115; 148, 149, 150. A choral ode would seem to have been the original form of Psalms 14 and 70. The two strophes and the epode are Psalm 14; the two antistrophes are Psalm 70. It is noteworthy that, on the breaking up of the original ode, each portion crept twice into the Psalter: Psalm 14 = 53, Psalm 70 = 40:14–18. Other such duplicated portions of psalms are Psalm 108:2–6 = Psalm 57:8–12; Psalm 108:7–14 = Psalm 60:7–14; Psalm 71:1–3 = Psalm 31:2–4. This loss of the original form of some of the psalms is considered by the Catholic Church's Pontifical Biblical Commission (1 May 1910) to have been due to liturgical practices, neglect by copyists, or other causes. Verse numbers were first printed in 1509. Different traditions exist whether to include the original heading into the counting or not. This leads to inconsistent numbering in 62 psalms, with an offset of 1, sometimes even 2 verses. Additional psalms The Septuagint, present in Eastern Orthodox churches, includes a Psalm 151; a Hebrew version of this was found