function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Cumming, Jeffrey M. & Sinclair, Bradley J.', 1],
    ['Freitas-Silva, Rafael A. P. & Ale-Rocha, Rosaly', 6],
    ['Grootaert, Patrick & Shamshev, Igor', 5],
    ['Grootaert, Patrick & Shamshev, Igor V.', 4],
    ['Grootaert, Patrick & Velde, Isabella Van De', 2],
    ['SHAMSHEV, IGOR V. & GROOTAERT, PATRICK', 1],
    ['Sinclair, Bradley J.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=20)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 7, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);