function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Khazali, Azhar Mohammed & Kachel, Hamid Saeid', 4],
    ['Chatzaki, Maria & Keer, Johan Van', 1],
    ['Crespo, Luis C & Domenech, Marc & Enguidanos, Alba', 1],
    ['Fomichev, Alexander A. & Marusik, Yuri M. & Koponen, Seppo', 1],
    ['ZONSTEIN, SERGEI & MARUSIK, YURI M.', 1],
    ['Zamani, Alireza', 6],
    ['Zamani, Alireza & Al-Yacoub, Ghassan A. Ali', 2],
    ['Zamani, Alireza & Seiedy, Marjan & Saboori, Alireza', 7]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=23)',
    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);