Unfortunately, the original version of this article  contained errors. Figure 1 was included incorrectly. The corrected Fig. 1 has been corrected in the original article and Fig. 1 is included correctly below.
Additionally there are minor typographical errors stated below:
Additional file 3: Figure S3 has been revised: The image in the lefthand panel of the 3rd row of Additional file 3: Figure S3 (w/ y-axis labeled "PSPC PDPL") was wrong.
Page 4, second paragraph, third sentence: "week" should be "weak", and the figure panel mentioned last in that sentence should read, "(Fig. 1i-k), not g-i.
The correct sentence is below:
"Col4a1mRNA expression was very weak at epithelial tips and surrounding mesenchyme at E16.5 (Fig.1h), but later, at E18.5, P6, and P30, it was clearly found in the lung interstitium and at the tips of the developing septa (Fig.1i-k)."
Page 8, first paragraph, first sentence contains a split infinitive; it should read, "To show abnormalities more clearly in the development of type I pneumonocytes…".
Page 11, third paragraph, the word "defects" is missing, which alters the nuance, making this sentence confusing. The sentence should read: "The absence of branching defects may be because we analyzed heterozygous mutants in which sufficient levels of native protein…".
(A–D) Histology of R26-CreER; Col4a1+/Flex41 and Tie2-Cre; Col4a1+/Flex41 mutants, and (E–I) immunohistochemistry analysis of PDPL-pSPC, HOPX, α-SMA, tropoelastin, and elastin in R26-CreER; Col4a1+/Flex41. (A, B) Hematoxylin and eosin shows that both R26-CreER; Col4a1+/Flex41 and Tie2-Cre; Col4a1+/Flex41 mutants have simplified alveolarization. (C) R26-CreER; Col4a1+/Flex41 septa are thick and with numerous blood capillaries (arrowheads) and cells with lipid content (arrows). (D) Tie2-Cre; Col4a1+/Flex41 septa are small and short with increases in blood capillaries (arrowheads), but not in cells with lipid content. (E) pSPC and PDPL co-staining shows a disorganized alveolar epithelium. (F) R26-CreER; Col4a1+/Flex41 display a decrease of type I pneumocytes as shown by nuclear staining of HOPX. (G–I) Abnormal localization of α-SMA, tropoelastin and elastin in the septa of R26-CreER; Col4a1+/Flex41 lungs. Scale bars = 200 μm in A and B, 35 μm in C and D, 50 μm in E, and 100 μm in F to I. (TIF 24706 kb)
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Loscertales, M., Nicolaou, F., Jeanne, M. et al. Erratum to: Type IV collagen drives alveolar epithelial–endothelial association and the morphogenetic movements of septation.
BMC Biol14, 73 (2016). https://doi.org/10.1186/s12915-016-0297-7