function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Kohansal, Mahnaz & Noei, Javad & Ramroodi, Sara', 1],
    ['LIU, DONG & YI, TIAN-CI & XU, YUN & ZHANG, ZHI-QIANG', 2],
    ['Noei, Javad & Rabieh, Mohammad Mahdi', 1],
    ['Saboori, Alireza & Hajiqanbar, Hamidreza & Hakimitabar, Masoud', 4],
    ['Saboori, Alireza & Shirvani, Zeinab', 5],
    ['Saboori, Alireza & Ueckermann, Edward A. & Harten, Antonius Van', 3],
    ['Tashakor, Samaneh & Hajiqanbar, Hamidreza & Saboori, Alireza', 5],
    ['Zhang, Zhi-Qiang', 4],
    ['Zhang, Zhi-Qiang & Xin, Jie-Liu Prof. Dr.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=26)',
    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);