function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Li, S. - C. & Chang, S. - Y.', 1],
    ['Stewart, F. H.', 1],
    ['Tang, Yong-Tao & Feng, Chen-Guang & Wanghe, Kun-Yuan', 2],
    ['Tchang, T. - L. & Tchang, I. - L.', 1],
    ['Tchang, T. - L. & Yueh, T. - H. & Hwang, H. - C.', 3],
    ['Wu, Y. - F. & Wu, C. - Z.', 1],
    ['Ye, Enqi & Xing, Yingchun & Zhang, Chunguang & Zhao, Yahui', 10]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);