function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alekseev, Vitalii I.', 1],
    ['Barševskis, Arvīds & Janovska, Marina & Aksjuta, Kristīna', 1],
    ['Broun, Thomas', 7],
    ['Ferreira, André Da Silva & Araújo, Maíra Xavier', 1],
    ['Hetschko, A.', 1],
    ['Ivie, Michael A. & Lord, Nathan P. & Foley, Ian A.', 6],
    ['Lord, Nathan P. & Leschen, Richard A. B.', 20],
    ['Sharp, David', 4],
    ['Stefanelli, Silvia & Della Rocca, Francesca & Bogliani, Giuseppe', 2],
    ['Swezey, O. H.', 1],
    ['Webster, Reginald P. & Sweeney, Jon D. & DeMerchant, Ian', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=45)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 11, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);