function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bian, Xun & Liu, Jing & Yang, Zizhong', 1],
    ['Cadena-Castañeda, Oscar J.', 1],
    ['Ingrisch, Sigfrid', 4],
    ['Li, Miaomiao & Sun, Mei Ling & Liu, Xianwei & Li, Kai', 15],
    ['Liu, Jing & Wu, Xiangyi & Bian, Xun', 4],
    ['Pang, Siyu & Zhang, Qianwen & Bian, Xun', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    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);