function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Calcinai, Barbara & Bavestrello, Giorgio & Bertolino, Marco', 1],
    ['Cóndor-Luján, Báslavi & Arteaga, Alvaro & Polo, Christian', 4],
    ['Diaz, Maria Cristina & Nuttall, Marissa & Pomponi, Shirley A.', 1],
    ['Morozov, Grigori & Sabirov, Rushan & Zimina, Olga', 2],
    ['Santos, George Garcia & Nascimento, Elielton & Pinheiro, Ulisses', 2],
    ['Topsent, Émile', 1],
    ['Turner, Thomas L. & Lonhart, Steve I.', 1],
    ['Ugalde, Diana & Gómez, Patricia & Simões, Nuno', 1],
    ['Van Soest, Rob W. M.', 3]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    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);