function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Bamber, Roger N. & Clark, Paul F.', 1],
    ['Grams, Markus & Klinger, Michael & Richter, Stefan', 1],
    ['Hendrickx, Michel E.', 5],
    ['Huber, Augusto Frederico & Ribeiro, Felipe Bezerra', 1],
    ['Meland, Kenneth & Aas, Pål Øyvind', 9],
    ['Richter, Stefan', 1],
    ['Sars, Georg Ossian', 5],
    ['Tonini, Lorena & Silva, Juliana Paulo Da & Filho, Arlindo Serpa', 1],
    ['Vicente, Carlos San', 10],
    ['Wittmann, Karl J.', 1],
    ['Wood-Mason, James & Alcock, Alfred William', 2],
    ['Yolanda, Rofiza & Ambarwati, Reni & Rahayu, Dwi Anggorowati', 2],
    ['Yolanda, Rofiza & Lheknim, Vachira & Price, W. Wayne', 9]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=48)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);