function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Alekseev, Vitalii I. & Drotikova, Anna M. & Rozhina, Viktoria I.', 2],
    ['Barševskis, Arvīds & Janovska, Marina & Aksjuta, Kristīna', 1],
    ['Chittaro, Yannick & Sanchez, Andreas & Blanc, Mickaël', 1],
    ['Fabricius, Johann Christian', 1],
    ['Grouvelle, A.', 1],
    ['Hellwig, Johann Christian Ludwig', 1],
    ['Herger, Peter & Germann, Christoph', 1],
    ['Herger, Peter & Germann, Christoph & Uhlig, Manfred', 1],
    ['Majka, Christopher G.', 5],
    ['Mitter, Heinz', 1],
    ['Mitter, Heinz & A, Upper', 1],
    ['Stefanelli, Silvia & Della Rocca, Francesca & Bogliani, Giuseppe', 4],
    ['Webster, Reginald P. & Sweeney, Jon D. & DeMerchant, Ian', 5]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=25)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 13, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);