function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Al-Kindi, Mohammed & Pickford, Martin & Al-Sinani, Yusouf', 1],
    ['Carrillo-Briceno, Jorge Domingo & Ruiz-Ramoni, Damian', 1],
    ['Christiansen, Per', 1],
    ['Denis Geraards', 1],
    ['Ferretti, Marco P.', 2],
    ['Markov, Georgi N. & Vergiev, Stoyan', 1],
    ['Montoya, Plinio & Ginsburg, Léonard & Alberdi, María Teresa', 2],
    ['Tassy, Pascal', 4],
    ['Wang, ShiQi & Shi, QinQin & He, Wen & Chen, ShanQin', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=15)',
    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);