function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Deng, Wei-An', 6],
    ['Deng, Wei-An & Lu, Xiang-Yi', 4],
    ['Ding, Jian-Hua & Wen, Ting-Chi & Wu, Xiao-Min', 1],
    ['Storozhenko, Sergey Yu. & Dawwrueng, Pattarawich', 4],
    ['Wang, Meng-Qi & Deng, Yao & Guan, De-Long & Mao, Ben-Yong', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=18)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 5, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);