function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Iturrieta-Gonzalez, Isabel & Garcia, Dania & Gene, Josepa', 6],
    ['Lee, Wonjun & Kim, Ji Seon & Seo, Chang Wan & Lee, Jun Won', 6],
    ['Tibpromma, Saowaluck & Hyde, Kevin D. & Bhat, Jayarama D.', 2],
    ['Wang, Si-Yao & Wang, Yong & Li, Yan', 4],
    ['Wijayawardene, Nalin N. & Dai, Dong-Qin & Premarathne, Bhagya M.', 1],
    ['Yadav, Sanjay & Verma, Sanjeet Kumar & Singh, Raghvendra', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=21)',
    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);