function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Khazali, Azhar Mohammed & Kachel, Hamid Saeid', 2],
    ['Blackwall, John', 1],
    ['Borges, Paulo A. V. & Gaspar, Clara', 2],
    ['Crespo, Luis C & Domenech, Marc & Enguidanos, Alba', 1],
    ['Dean, David Allen', 3],
    ['Hu, Changhao & Liu, Jie & Wang, Kai', 1],
    ['Lucas, Pierre Hippolyte', 2],
    ['Magalhães, Mayara D. F. & Santos, Adalberto J.', 3],
    ['Paschetta, Mauro & Christille, Claretta & Marguerettaz, Fabio', 1],
    ['Reboleira, Ana Sofia P. S. & Pérez, Antonio José', 8],
    ['Santos, Adalberto J. & Gonzaga, Marcelo O.', 5],
    ['Tripathi, Rishikesh & Sudhikumar, Ambalaparambil V.', 1],
    ['ZONSTEIN, SERGEI & MARUSIK, YURI M.', 1],
    ['Zamani, Alireza & Bosselaers, Jan', 7],
    ['Zamani, Alireza & Marusik, Yuri M.', 8]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=46)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 15, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);