function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Abdel-Dayem, Mahmoud S. & Elgharbawy, Ali A. & Rasool, Iftekhar', 2],
    ['Abdel-Dayem, Mahmoud S. & Fad, Hassan H. & El-Torkey, Ashraf M.', 2],
    ['Abdel-Dayem, Mahmoud S. & Rasool, Iftekhar & Elgharbawy, Ali A.', 2],
    ['Akhil, S. V. & Divya, M. & Sabu, K. Thomas', 30],
    ['Azadbakhsh, Saeed & Mirmoayedi, Alinaghi & Jamali, Samad', 2],
    ['Bousquet, Yves', 51],
    ['Erwin, Terry L.', 10],
    ['Guéorguiev, B.', 4],
    ['Hristovski, Slavčo & Guéorguiev, Borislav', 9],
    ['Kesdek, M. & Yildirim, E.', 10],
    ['Kostova, Rumyana & Gueorguiev, Borislav', 20],
    ['Pilon, Nicola & Cardarelli, Elisa & Bogliani, Giuseppe', 10],
    ['Teofilova, Teodora', 4],
    ['Tian, Mingyi & Deuve, Thierry', 8],
    ['Ullah, Mishkat & Naeem, Muhammad & Mahmood, Khalid', 4],
    ['Other (14)', 21]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=189)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 16, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);