Figure 1From: Patterns of regional lymph node metastasis of nasopharyngeal carcinoma: A meta-analysis of clinical evidence Begg's Funnel Plot assessing publication bias for the proportion of patients presenting with any LN metastasis in 11 relevant studies. Yellow dots represent the 11 relevant studies. Y axis is the proportion of patients in the particular study presenting with any lymph node metastasis. X axis is the standard error of this proportion of interest.Back to article page