function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abdel-Dayem, Mahmoud S. & Fad, Hassan H. & El-Torkey, Ashraf M.', 2],
    ['Akhter, Muhammad Atique & Drumont, Alain & Rizvi, Syed Anser', 2],
    ['Girard, Claude', 3],
    ['Gulpercin, Nilay & Tezcan, Serdar', 1],
    ['Hoffmannova, Johana & Packova, Gabriela', 6],
    ['Nasserzadeh, Hiva', 2],
    ['Nasserzadeh, Hiva & Platia, Giuseppe & Parsi, Farzaneh', 2],
    ['Nasserzadeh, Hiva & Platia, Giuseppe & Serri, Sayeh', 2],
    ['Németh, T. & Platia, G.', 1],
    ['Platia, Giuseppe & Ghahari, Hassan', 6]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=27)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 10, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);