function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bao, Shu-Xin & Li, Ying & Zhou, De-Qun & Thongklang, Naritsada', 2],
    ['Jarvis, Charlie', 4],
    ['Landeros, Fidel & Ferrusca-Rico, Felipe M.', 1],
    ['Li, Tai-Shun & Zhou, De-Qun & Zhao, Qi & Zhang, Ying', 1],
    ['Lu, Jin-Rong & Yu, Feng-Ming & Lei, Lei & Zhang, Ying & Zhao, Qi', 3],
    ['Wang, Xin-Cun & Liu, Tie-Zhi & Chen, Shuang-Lin & Li, Yi', 5],
    ['Xu, Rong-Ju & Li, Lu & Zhao, Qi', 2],
    ['Zambrano-Forero, Cristian J & Davila-Giraldo, Lina R', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);