function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chen, Zhongguang & Wu, Jiayun & Wen, Anxiang', 1],
    ['Ho, Hsuan-Ching & Shao, Kwang-Tsao', 2],
    ['Kim, Su-Hwan & Kim, Hyeong-Su & Park, Jong-Young', 1],
    ['Kim, Su-hwan & Yun, Seung-woon & Park, Jong-young', 1],
    ['Nichols, J. T.', 1],
    ['Regan, C. T.', 1],
    ['Tchang, T. - L.', 1],
    ['Xie, Rui-Xia', 1],
    ['Ye, Enqi & Xing, Yingchun & Zhang, Chunguang & Zhao, Yahui', 2],
    ['Zheng, P. - S.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=12)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);