function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Chen, Ya-Zhen & Deng, Wei-An', 3],
    ['Dawwrueng, Pattarawich & Vitheepradit, Akekawat', 5],
    ['Deng, Wei-An & Zheng, Zhe-Min & Li, Xiao-Dong & Lin, Min-Ping', 1],
    ['Ding, Jian-Hua & Wen, Ting-Chi & Wu, Xiao-Min', 1],
    ['Storozhenko, Sergey Yu. & Dawwrueng, Pattarawich', 4],
    ['Tan, Ming Kai & Vu, Trung Thanh & Le, Cuong Viet Canh', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 6, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);