function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Divakar, Pradeep K. & Crespo, Ana & Núñez-Zapata, Jano', 30],
    ['Elvebakk, A. & Bjerke, J. W. & Støvern, L. E.', 12],
    ['R, Jeanne dos & Silva, eis & Aptroot, André & E, Marcela', 24],
    ['van den Boom, Pieter P. G. & Clerc, Philippe & Ertz, Damien', 2]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=68)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 4, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);