function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Arabuli, Lela & Murvanidze, Lali & Faltynkova, Anna', 1],
    ['Blasco-Costa, Isabel & Balbuena, Juan Antonio & Raga, J. A.', 1],
    ['Blasco-Costa, Isabel & Montero, F. E. & Gibson, David Ian', 2],
    ['Dutta, I. B.', 1],
    ['El-Shahawi, G. A. Z. & El-Gindy, H. I. & Imam, E. A.', 2],
    ['Hunter, Wanda Sanborn & Thomas, Lyell J.', 1],
    ['Liu, Sheng-fa & Wang, Yan-hai & Peng, Wen-feng & Yu, Shui-zhou', 1],
    ['Looss, A.', 2],
    ['Ramadan, M. M. & Saoud, M. F. A & Ashour, A. A. & Mansour, D. A.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=12)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 9, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);