function drawChartTreatmentsPerAuthor() {
  var chartData = google.visualization.arrayToDataTable([
    ['Series', 'Number of Treatments'],
    ['Barševskis, Arvīds & Janovska, Marina & Aksjuta, Kristīna', 2],
    ['Borges, Paulo A. V. & Gaspar, Clara', 2],
    ['Etzler, Frank E.', 1],
    ['Ferreira, Vinicius De Souza', 2],
    ['Gulpercin, N. & Tezcan, S.', 1],
    ['Kabalak, Mahmut & Sert, Osman', 3],
    ['Németh, T. & Platia, G.', 1],
    ['Németh, Tamás', 1],
    ['Platia, Giuseppe & Ghahari, Hassan', 6],
    ['Platia, Giuseppe & Kabalak, Mahmut & Sert, Osman', 1],
    ['Ruchin, Alexaner B. & Egorov, Leonid V. & Alekseev, Sergei K.', 1],
    ['Sert, Osman & Kabalak, Mahmut', 1],
    ['Webster, Reginald P. & Sweeney, Jon D. & DeMerchant, Ian', 2],
    ['Webster, Reginald P. & Webster, Vincent L.', 1]
  ]);
  var chartOptions = {
    pieHole: 0,
    title: 'Treatments per Author (n=25)',
    fontSize: 'automatic',
    doWeHaveDanglingCommas: 'No ;-)'
  };
  if (window.customizeGoogleChartOptions)
    customizeGoogleChartOptions(chartOptions, 'TreatmentsPerAuthor', 'pie', 14, 0);
  var chart = new google.visualization.PieChart(document.getElementById('chartDivTreatmentsPerAuthor'));
  chart.draw(chartData, chartOptions);
}
google.load('visualization', '1', {'packages': ['corechart']});
google.setOnLoadCallback(drawChartTreatmentsPerAuthor);