function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chen, Hui-Ming & Zhu, Ming-Sheng', 2],
    ['Lin, Yucheng & Li, Shuqiang', 19],
    ['Lin, Yucheng & Pham, Dinh-Sac & Li, Shuqiang', 2],
    ['Tong, Yanfeng & Li, Shuqiang', 10],
    ['Wang, Chunxia & Li, Shuqiang', 14],
    ['Wang, Chunxia & Ribera, Carles & Li, Shuqiang', 1],
    ['Zhao, Huifeng & Li, Shuqiang & Zhang, Aibing', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=53)',
    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);