function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Castritsi-Catharios, Jeanne & Van, Rob W. M.', 1],
    ['Ellis, John & Solander, Daniel Carl', 1],
    ['Manconi, Renata & Cadeddu, Barbara & Ledda, Fabio', 5],
    ['Montagu, George', 1],
    ['Samaai, Toufiek & Pillay, Ruwen & Janson, Liesl', 4],
    ['Ugalde, Diana & Fernandez, Julio C. C. & Gómez, Patricia', 1],
    ['Van Soest, Rob W. M.', 39],
    ['Van, Rob W. M. & Kaiser, Kirstie L. & Syoc, Robert Van', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=53)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 8, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);