function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Albano, Paolo G. & Bakker, Piet A. J. & Janssen, Ronald', 1],
    ['Cavallari, Daniel C. & Dornellas, Ana Paula S.', 1],
    ['Cavallari, Daniel C. & Salvador, Rodrigo B.', 2],
    ['Cavallari, Daniel C. & Salvador, Rodrigo B. & Simone, Luiz R. L.', 1],
    ['Hansen, Thomas', 2],
    ['Helwerda, Renate Ariane & Wesselingh, Frank Pieter', 3],
    ['Herbert, David G.', 2],
    ['Poppe, Guido & Tagaro, Sheila & Dekker, Henk', 2],
    ['Rolán, E. & Hernandez, J. M. & Deniz, F', 2]
  ]);
  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);