function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Evenhuis, Neal L. & Pape, Thomas', 1],
    ['Faulwetter, Sarah & Simboura, Nomiki & Katsiaras, Nikolaos', 8],
    ['Kato, Tetsuya & Pleijel, Fredrik', 1],
    ['Mikac, Barbara', 1],
    ['Pleijel, Fredrik & Aguado, Maria Teresa & Rouse, Greg W.', 2],
    ['Prunera-Olivé, Joan & Vorontsova, Maria S. & Williams, Emma V.', 1],
    ['Salazar-Vallejo, Sergio I. & Carrera-Parra, Luis F.', 1],
    ['Zhou, Ya-Dong & Mwachala, Geoffrey & Hu, Guang-Wan', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=16)',
    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);