function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bernard, K. A. & Pacheco, A. L. & Burdz, T. & Wiebe, D.', 2],
    ['Choi, Jung-Hye & Cha, Ju-Hee & Bae, Jin-Woo & Cho, Jang-Cheon', 4],
    ['Kim, Mi-Sun & Jeong, Seong-Hwa & Kang, Joo-Won & Kim, Seung-Bum', 6],
    ['Ko, Kwan Su & Cha, Chang-Jun & Im, Wan-Taek & Kim, Seung-Bum', 5],
    ['Zhang, Gaiyun & Wang, Lina & Xie, Fuquan & Pei, Shengxiang', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=19)',
    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);